Gt2876r

[Limbo]

Just wondering if anyone has a GT2876R with an .64 rear on their b16?
Just wondering if someone can give me an idea of when it starts to build boost and when it actually hits full boost (say 10PSI or so)?

[EGB18CT]

better to just do a gt30r with the .64 rear housing, the intake and exhaust turbines are too out of proportion, the max i'd go is a gt2871r, the 76 will be more laggy. either look at a gt30r .64 otherwise look into a gt28rs by atpturbo.com, slightly larger than a normal gt28rs due to a custom .86 t3 housing i believe good for around 350hp without power dropping off radically.

[Limbo]

i believe the one i have is a GT2540, the HKS version of the GT2876
It has the smaller front (SR20 a/r .60) rather than the .70.
looking at the specs, the rear & rear wheel seems the same to a 28RS, and with a smaller front, i think the only difference is the compressor wheel is larger.

Would it still be as laggy?

[Lukezen27]

i believe the one i have is a GT2540, the HKS version of the GT2876
It has the smaller front (SR20 a/r .60) rather than the .70.
looking at the specs, the rear & rear wheel seems the same to a 28RS, and with a smaller front, i think the only difference is the compressor wheel is larger.

Would it still be as laggy?

Sounds a lot like mine Hao

440HP Garrett/APS SR40, GT25 Based Turbo
.86 a/r Exhaust, Flanges Supplied (hoping the log manifold will help with the lag)
.60 a/r Inlett, 2" Discharge, 2 1/2" Inlett
GT 25 Flanges

[Limbo]

i dun think the manifold will make that much difference. I think its the turbo characterists, dunno i'm gonna ask Adrian if he knows

[SLOWEGG]

Have you bought the turbo yet? If not, Gt30 would be a nice choice.

[Lukezen27]

Have you bought the turbo yet? If not, Gt30 would be a nice choice.

Yeah he brought it as I have lol

Mine only cost $900 brand new so I can't justify spending $2000

I can live with a bit of lag to start with and change down the track if its not to my liking

I'm used to lag with my old non BB turbo anyway hahah

[Limbo]

yeah its being delivered tomorrow or Weds.
We'll see what happens then.

[Limbo]

after some research found out that the hot side is identical to a gt2871, and spooling is basically identical.
Only diff is that the front side is larger. Hopefully with the smaller front housing it will not be that laggy

[Lukezen27]

So can someone explain to me how this works?

.60 in for faster spooling then .86 rear with curse lag..

Still learning this stuff

[ZeForce]

http://www.evans-tuning.com/techarticle_compressorsturbinesp1.html

http://www.evans-tuning.com/techarticle_turbines.html

http://www.evans-tuning.com/techarticle_horsepower.html

[Limbo]

thanks that was a good read.
Fingers crossed it works that way when i put it on the car

[Lukezen27]

thanks that was a good read.
Fingers crossed it works that way when i put it on the car

Hey Hao

My Garrett rear dose have a part number .86 T712

[Limbo]

http://www.turbobygarrett.com/

Judging by what i've seen it looks like an RS front - goto the link above for the measurements.
http://www.turbobygarrett.com/turbobygarrett/images/catalog/Turbochargers/gt28_pdfs/Garrett_GT2860RS_739548_1_5_new.pdf

The rear is an .86 which will make it laggy, from what i'm reading

You have to rem only a few companies actually make turbo parts.

If you can change to that .64 rear i told you about it would be good.

The 60,71 & 76 have the same rear but each one has a larger front compressor, which will give it abit more lag on spool.

Hopefully due to the smaller inlet and exhaust mine will still spool in the 3-4krpm mark

[Lukezen27]

So now I need to find a .64 rear cheap lol

[destrukshn]

pm sent luke.
=)

[Lukezen27]

pm sent luke.
=)

Sold :)

[votek]

well the gt2876r is not meant for our engines, its meant for engines where 3 cylinders feed a turbo which feeds 6

and in most cases very laggy

[Limbo]

i'll see how we go, since it a hi comp turbo, we'll see if its laggy

[lookingforboost]

well the GTiR pulsar from the factory runs a T28 with a .86 rear housing and they are non ball bearing builds boost and has full boost by about 3600rpm and the B16 having a more rev happy nature will make this turbo boost up fast anyway as the pulsar could only rev to 7000 rpm so the meat of the turbo will still be in the rev range for the B16

[Limbo]

its a smaller t28, T2560 if i rem rightly, also its a low comp engine, its too hard to compare it to a b16.

I think you've missed the point of what i was looking at. But going by other setups & talking to people with something similar, looks like this turbo will boost at around 4krpm & will be a happy power maker


well the GTiR pulsar from the factory runs a T28 with a .86 rear housing and they are non ball bearing builds boost and has full boost by about 3600rpm and the B16 having a more rev happy nature will make this turbo boost up fast anyway as the pulsar could only rev to 7000 rpm so the meat of the turbo will still be in the rev range for the B16

[lookingforboost]

its a smaller t28, T2560 if i rem rightly, also its a low comp engine, its too hard to compare it to a b16.

I think you've missed the point of what i was looking at. But going by other setups & talking to people with something similar, looks like this turbo will boost at around 4krpm & will be a happy power maker

Nar the GTiR used the largest of the factory T28 turbos and ran the .86 rear housing the T2560 is a different turbo completly and yes it is a low comp motor using a 8.5.1 i cant remember for sure.

the point i was trying to make was that the .86 is used on another 4cyc motor and isent that laggy

higher comp motor plus a ball bearings make it a faster spooling turbo that wont cause much problems with lag

[EGB18CT]

get a gt30 .64 simple as tom has shown you as well as many others on evans-tunig.com.

[Limbo]

i've already invested in a good t28 manifold already so its gonna have to be a t28 turbo

[Limbo]

prawned! LOL


Sold :)

[Lukezen27]

prawned! LOL

lol Hao

[EGB18CT]

how much power and rev you looking at? if around 300-350hp the atpturbo.com gt28rs would be nice but then you say you have a t28 flange... bugger cos its a t3.

if not looking at a t3 manifold or even change the flange the max id go is a gt2871r

[mooshie]

what about this- http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3071R_700382_20.htm

[kraiye]

http://www.evans-tuning.com/techarticle_compressorsturbinesp1.html

http://www.evans-tuning.com/techarticle_turbines.html

http://www.evans-tuning.com/techarticle_horsepower.html

happy to see these guys like the sk2 pro1 cams ;):thumbsup:

[EGB18CT]

yes they love the skunk pro 1 cams an upgrade from the itr cams, although they are much much harsher on the valve train, there are other cams that would work well too.

[kraiye]

i'm running pro1's... my head is very noisy! i hate to think of the punishment my valve train is copping, titanium or otherwise!

[EGB18CT]

even Ti retainers cop a beating, many on H-T in the states have have heaps of wear on their TI retainers (supertech and i believe skunk2 brands) at around 10 to 20 mi. Keep a regular check on the wear of the retainers, make sure the springs seat up to the retainers properly else will have some nice FAIL! supertech make some nice cromo retainers too, its all go to do with the spring being stainless or steel and the different metal ie Ti of the retainer and they way the springs meet up to the retainer. Anyway keep check on you valvetrain when using harsh cams - as with anything.

[warwick]

so is the GTIR pulsar turbo a better turbo for a stock B16 or is one of these 2871r's a more streetable turbo ?

[Limbo]

GTIR is a t28 bush bearing with a larger rear.
2871 is larger and its ballbearing so spools up better

[Limbo]

hmm haven't heard from weq yet... unusual.....

[Lukezen27]

hmm haven't heard from weq yet... unusual.....

Hes on here less and less ;)

[Limbo]

finally found some positive info about this turbo
from http://www.pumaspeed.co.uk/showdetails.php?id=217


Power 300-380 bhp

Fitting Charge: £ 287.5Open the door to big Power 300-370 bhp

DIY fit
Fully reliable and tested
actuator set to 20 PSI
All Pumaspeed Turbos Now come with a FREE FORGE actuator upgrade worth over 100 pounds

Wow
Power and torque are on the up 310-350bhp !!! fully reliable and tested. This now industry standard GT2876RS Turbo was the first to be used on the Focus RS and still holds the official record time at bruntingthrpe proving ground
A perfectly balance turbo that will fullfill the power hungry.
Tests on our own development car have seen power of 325-380 bhp dependant on engine spec
GT28 down pipe will be required and a turbo fitting kit
See demo car in the gallery section
The 54mm turbine wheel and 0.64 A/R turbine housing enable ultimate responce combined with powerful air flow from the 44 lb/min compressor wheel.

Focus RS Turbo sizing guide.
There are very complex naming standards in the world of turbo building, so we have simplyfied the naming process to assist in the understanding of the complex world of turbo design and performance,

The GT25 is a std turbo as fitted to the FOCUS RS.
The GT26 is a better version of the std turbo - not popular as a power upgrade - alows for higher boost and minimal flow added.
The GT26Plus Hybrid (we call it a gt26Plus as it still uses the original restrictive FORD exhaust housing although we heavily modify it) - it is for those who do not want to swap down pipes oil feed lines but do want as much as possible from the etc
- can flow 330+bhp and 28 PSI (not that you willl ever run 2 bar !)
- positive boost starts as early as 2100 (mapping dependant)
- is fully gt28 cored (roller bearing)
- uses a heavily modified machined & ported exhaust turbine housing, 71mm high flow compressor wheel from the gt2871 we do,
- complete with with a H Duty billet Forge actuator worth in excess of �100
- Produces an healthy Increase in torque and horsepower over the gt25 std FRS turbo

The GT27 low lag aka. the GT2871RS a true GT28 in all sense of the word.
- requires the gt28 downpipe and fitting kit and is best fitted with a high flow manifold.
- Fully roller bearing cored
- has proved over 350 bhp in this application 390 in others !!
- positive boost starts 2450 (mapping dependant)

The GT28 aka. GT2876RS a true gt28 in all sense of the word.
- requires the Milltek sport GT28 downpipe and fitting kit and is best fitted with a high flow manifold.
- Fully roller bearing
- has proved over 350 bhp in this application 390 in others !!
- positive boost starts 2650 (mapping dependant)
- full boost near 3300
The GT29 aka. GT3071RS large power 420 is well within it capability, should be used with very well moddified cylinder heads.
- requires the gt28 downpipe and fitting kit and is best fitted with a high flow manifold.
- Fully roller bearing
- has proved over 395bhp in this application 440in others !!
- positive boost starts 2850 (mapping dependant)
- full boost near 3500

The GT30 - too big for road use must be used with external wastegate and is only for cery bespoke engine conversions 500-550 bhp.

[TODA AU]

The GT30 - too big for road use must be used with external wastegate and is only for cery bespoke engine conversions 500-550 bhp.
http://whoyoucallingaskeptic.files.wordpress.com/2008/07/bullshit.jpg

[[ricer]]

woah what u doing hao?

not happy with your current set up?

[Limbo]

LOL is that cow shit or horse shit?

Ricer - yeah got the turbo bug

Toda - didn't you tell me abit of lag is good?


Waiting for it all to be put together now!

THen tune
Then LSD

and then off to eastern creek again

[[ricer]]

turbo bug has bitten u hard lol

good luck with all of it bro

[mooshie]

what about this- http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3071R_700382_20.htm

So would this be a good turbo? on a standard B18C/B16 and about 8PSI.

[Lukezen27]

So would this be a good turbo? on a standard B18C/B16 and about 8PSI.

Yes it would but I lot of people say got GT30 with .68 rear instead of the 0.86 in that link..

I'd say on that size turbo they'd be right but not all believe that

I've got a GT2871 with a 0.86 rear to make up for the smallish turbo size as is my understanding

[Limbo]

yeah apparently the GT3071r is the choice of a hi-power turbo.

We've got T28s cos our manifolds are T28, that's what happens when you start small and build your way up

[destrukshn]

LOL is that cow shit or horse shit?

Ricer - yeah got the turbo bug

Toda - didn't you tell me abit of lag is good?


Waiting for it all to be put together now!

THen tune
Then LSD

and then off to eastern creek again
see you there.
getting tuned on sat.
=)

[Limbo]

lol i don't think i'll be there, still waiting for it to be put together!


BTW.... what do u guys think about my injectors, i'm only running 440cc, do u think they are large enough?

[Limbo]

some more info i found....
http://www.nissansilvia.com/forums/lofiversion/index.php/t300144.html


The GT2876R (AKA GT2540R) in my opinion suffers from to much compressor for the turbine.

A bit of back ground on the 48 trim T04S compressor used in the GT2876R.
The 48 trim TO4S compressor is cut from the same compressor casting as the 7 bladed GT3076R, HKS TO4S and the tried and proven TO4 60-1.
It’s all the same compressor casting but in different trims.
It is also a very good compressor when matched to the right turbine.

The TO4S compressor wheel has received a pretty bad name over the years because Garrett seem to keep under driving them like with the GT2876R making a lagy turbo for its size. With the GT3076R’s the 56 trim 6 bladed GT30 version flows about the same as a 50 or 52 trim 7 bladed T04S version so when they put a 56 trim TO4S compressor on a GT30 turbine the turbo becomes quite a bit lagier.
The TO4S compressor wheel really needs a bigger turbine trim for trim to work properly.

The GT2871R compressor is smaller and flows less than the GT2876R so it is a better combination for a SR20. Especially in the smaller trims.

[EGB18CT]

smallest turbo id go is a gt28rs atpturbo.com modified gt28rs with their t3 .82 rear housing this will be good for 300hp easy, pushing on 350hp maybe, perfect for a stock motor.

otherwise the gt3076r in .82 rear 300-350hp for a stock motor planning on getting rods and pistons.

then gt35r in .82 for 450hp + on a built motor going to insane levels is the gt40 or 42r or something from borg warner.

the top turbo's are the one's to look at basically, remember its a fwd, lag is not all that bad, too much torque = no traction and fry the tyres.

[Limbo]

yeah i hear ya, but i've already got the turbo and the parts.

But on another note, i think i might have a gt2871r now that i've been researching more.
I took the guy's word that it was a gt2876, but now that i've been looking around. It seems the gt2876 was never offered in the gt28r front compressor housing trim.
HKS offerred it in that trim, but they are badged HKS. With the Garrett range only the gt2871r seems to be offered in that front trim. The garrett tag was abit faded and i never looked. ALso the inducer is only .8mm difference so i never bothered measuring also

Will keep posted on what i got...

[FastFwd]

Limbo just do what i did last night. get the serial number from the badge of the turbo. Then google it. It will tell you exactly what turbo you have. Then you can also see what compressor housing it has by what it says on the front of the compressor, and the same with the trim on the exhaust end. E.g


Ok guys this is the details i gathered of the turbo, so i finally know what turbo i have now and what i can push it to.

Compressor housing:
Garret A/R60 m24 1-2

Exhaust housing:
Garret 0.64

Badge:
DI 0334J
1441-G1f00
466541-4

The turbo is know as the GT2560R-4 (aka gt28r) which can take upto 330hp and has a max efficiency rating at around 14-16psi depending on the setup. It has a really quick spool and its nice but it just lacks alot in the top end.

http://www.turbobygarrett.com/turbob...R_466541_4.htm

http://www.ozhonda.com/forum/showthread.php?t=104177&page=2

[Limbo]

yeah can't read the stupid serial as part of the badge is missing

[FastFwd]

ohhh thats gotta suck dude.